There are some geothermal projects planned in the UK, for the generation of heat, electricity, or both. There is also a commercial plant in Southampton which in 1986, began delivering heat from a borehole to a district heating network, and is now operated by the energy firm ENGIE.[5]ThinkGeoEnergy, a news and blogging website focusing on the Geothermal industry in the UK, has a list of projects.

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In May 2012, a paper by consultants SKM in association with the Renewable Energy Association (an industry trade body) argued that geothermal power could provide 20% of the UK’s electricity and all of the UK’s heat demand.[7]

In 2013, a Government commissioned Deep Geothermal Review Study by the consultancy Atkins concluded a lower figure of 4% of annual electricity requirements (in 2013 figures).[8]

In 2017, a study estimated that the UK had enough resource that was ‘theoretically available’ to easily surpass all UK energy demand (in 2015) but the amount that was ‘technically available’ was much smaller than the ‘theoretical’ resource and recovery would depend on depths drilled and areas targeted.[9]

You may joke, but given how little geological activity there is in this country (unlike in Iceland), I seriously have to wonder how practical geothermal energy is for the UK. Drilling deep is expensive, and without volcanoes to keep the local geology hot I don't see much energy being extracted without depleting it, requiring yet another expensive borehole to be drilled.